CN205987557U - High -efficient circuit board production system - Google Patents
High -efficient circuit board production system Download PDFInfo
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- CN205987557U CN205987557U CN201620740432.0U CN201620740432U CN205987557U CN 205987557 U CN205987557 U CN 205987557U CN 201620740432 U CN201620740432 U CN 201620740432U CN 205987557 U CN205987557 U CN 205987557U
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- suction
- circuit board
- knife
- liquid medicine
- vacuum generator
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Abstract
The utility model discloses a high -efficient circuit board production system, including circuit board transfer chain, medicine water containing ware, spraying system and the sword that absorbs water, circuit board transfer chain set up in the top of medicine water containing ware, spraying system's the direction that sprays moves towards circuit board transfer chain, the sword that absorbs water set up in the top of circuit board transfer chain still is provided with vacuum generator and fan, the air outlet intercommunication of fan vacuum generator's compressed air entry, vacuum generator's absorption chamber entry intercommunication the suction through -hole of sword absorbs water. The utility model discloses a circuit board production system has following advantage: 1. Adopting wind -force to blow vacuum generator and producing the negative pressure and offer the sword suction that absorbs water, simple structure is reliable, 2. Adopt the mode of " one to one ", a vacuum generator provides the suction of the sword that absorbs water alone, has avoided a certain individual when absorbing water the sword because of closing, leads to the suction of all the other swoves that absorb water too big, 3. The sword that absorbs water adopts multiple mode simultaneously, has avoided the phenomenon of cardboard.
Description
Technical field
The utility model belongs to the technical field of printed circuit board, particularly to a kind of efficient circuits plate production system.
Background technology
Because electronic product is with volume-diminished, thickness gets over thinning, microminiaturization, and integrated direction development；Printed circuit
Plate must be by wire more densification, thickness of slab more thinning；From conventional 50um gradually to 40um, 30um sends out in direction circuit board line
Exhibition, the thickness of slab of wiring board is gradually developed to 0.03mm is thick from 0.05mm；With circuit more tinyization and more denseization, traditional is aobvious
Shadow or etching machine cannot meet to more tiny, and more denseization and thinner direction are developed, and can only meet the tiny circuit of 40um,
Through reaching a bottleneck period；It is mainly shown as wiring board upper face pool effect.Routine waves development or etching cannot eliminate
The pool effect of upper face, so leads to edge different with intermediate reaction speed it is impossible to finer and closely woven circuit development and lose
Carve.Therefore, effectively solves the problems, such as that wiring board develops/etch upper face pool effect, reach development and circuit etching 40um with
30um breaks through, and avoids etching solution with severe corrosive to equipment corrosion, thus reducing the service life of equipment, is mesh
Front those skilled in the art problem in the urgent need to address.
Utility model content
The purpose of this utility model is to solve above-mentioned technical problem, proposes a kind of efficient and high circuit board of reliability
Production system.
A kind of efficient circuits plate production system, including circuit board pipeline, liquid medicine container, spray system and water suction knife, institute
State the top that circuit board pipeline is arranged at described liquid medicine container, the spray direction of described spray system is defeated towards described circuit board
Line sending, described water suction knife is arranged at the top of described circuit board pipeline, is additionally provided with vacuum generator and blower fan, described blower fan
Air outlet connect the compressed air inlet of described vacuum generator, the adsorbent chamber entrance of described vacuum generator connects described suction
The suction through hole of water knife.
Preferably, it is provided with some vacuum generators, the adsorbent chamber entrance connection of each vacuum generator is corresponding to absorb water
Knife.
Preferably, the gas outlet of described vacuum generator is arranged between described circuit board pipeline and liquid medicine container, or
Person, the gas outlet of described vacuum generator is arranged in liquid medicine container, and the liquid medicine that liquid medicine container holds does not soak described gas outlet.
Preferably, it is additionally provided with vapour liquid separator, the gas outlet of described vapour-liquid filter connects the air inlet of described blower fan,
The delivery port of described vapour-liquid filter is arranged at the top of described liquid medicine container.
Preferably, it is additionally provided with suction valve, the compressed air that described suction valve is arranged at described vacuum generator enters
Mouthful.
Preferably, described water suction knife includes side wall, roof, suction through hole and suction nozzle with battery unit；Described roof, side wall and suction nozzle with battery unit
Surround into the water suction cavity of described water suction knife, described suction through hole is arranged at the middle part of described roof；Described suction nozzle with battery unit is circular arc
Shape, described suction nozzle with battery unit is provided with suction hole, and described suction hole is arranged at the both sides of the center of arc end of suction nozzle with battery unit.
Preferably, described water suction knife also includes inhaling knife wing, and described suction nozzle with battery unit is fixed in one end of described suction knife wing
The side of suction hole, the middle part of described suction knife wing is to the top bending of described water suction knife.
Preferably, described suction nozzle with battery unit is titanium tube, is additionally provided with connection sucker, described connection sucker is arranged at described suction nozzle with battery unit
Upper end center of arc end.
Preferably, it is additionally provided with stationary barrier, the middle part of the inner side of described roof is fixed at the two ends of described stationary barrier,
The middle part of described stationary barrier is provided with bulkhead through-hole.
Preferably, the suction through hole of described water suction knife is connected with described vacuum generator by telescoping tube.
Circuit board production system of the present utility model has advantages below：1. adopt wind blows vacuum generator to produce negative
Press and be supplied to water suction knife suction, simple and reliable for structure；2., by the way of " one-to-one ", a vacuum generator is provided separately
The suction of one water suction knife, it is to avoid because close some absorb water knife when, lead to the suction of remaining water suction knife excessive；3. absorb water knife
Adopt various ways, it is to avoid the phenomenon of clamp simultaneously.
Brief description
Accompanying drawing is described further to the utility model, but the content in accompanying drawing is not constituted to any limit of the present utility model
System.
Fig. 1 is the schematic diagram of the circuit board production line of the one of embodiment of the utility model；
Fig. 2 is the partial enlarged drawing of the one of embodiment of the utility model；
Fig. 3 is the schematic diagram of the water suction knife of the one of embodiment of the utility model；
Fig. 4 is the partial enlarged drawing of the water suction knife of the one of embodiment of the utility model.
Wherein：Circuit board pipeline 1；Printed circuit board 11；Upper roll wheel 12；Lower roll wheel 13；Liquid medicine container 2；Liquid medicine 21；Medicine
Sprinkler head 3；Liquid medicine filter block 31；Liquid medicine valve 32；Liquid medicine pump 33；Go out water filter 34；Water pressure gauge 35；Water suction knife 4；Side wall
41；Roof 42；Suction through hole 43；Suction nozzle with battery unit 44；Suction hole 441；Connection sucker 442；Inhale knife wing 45；Stationary barrier 46；Every
Plate through hole 461；Vacuum generator 5；；Blower fan 6；Liquid/gas separator 61；Air gauge 62；Vapour-liquid filter 63.
Specific embodiment
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by specific embodiment.
The efficient circuits plate production system of the present embodiment, as shown in figure 1, include circuit board pipeline 1, liquid medicine container 2, spray
Pouring system and water suction knife 4, described circuit board pipeline 1 is arranged at the top of described liquid medicine container 2, the spray of described spray system
Direction is arranged at the top of described circuit board pipeline 1 towards described circuit board pipeline 1, described water suction knife 4, is additionally provided with true
Empty generator 5 and blower fan 6, the air outlet of described blower fan 6 connects the compressed air inlet of described vacuum generator 5, described vacuum
The suction through hole 43 of the adsorbent chamber entrance connection described water suction knife 4 of generator 5.
The present embodiment efficient circuits plate production system, using vacuum generator 5（Preferably Venturi tube）, using blower fan
6 offer malleation sources of the gas and produce negative pressure on the printed circuit board 11 in etching process residual liquid medicine 21 adsorb,
Avoid the pool effect that liquid medicine 21 produces in printed circuit board 11 so that the part of printed circuit board 11 is etched excessively, and
Part then etches problem not in place, produces precision and significantly gets a promotion；Liquid medicine 21 after absorption occurs in vacuum together with gas
The gas outlet of device 5 sprays, it is to avoid the corrosion to remaining equipment for the corrosivity of liquid medicine 21；And enter the pressure of vacuum generator 5
Contracting air intake is only air, does not have corrosivity liquid medicine 21；And gas outlet sprays for the liquid-vapor mixture based on air,
Liquid medicine 21 by substantial amounts of spray by pressure-air parcel and quickly, almost in contact with the not side wall of vacuum generator 5, so also big
Decrease greatly liquid medicine 21 to the corrosion at gas outlet position so that the service life of vacuum generator 5 greatly increases.
Preferably, it is provided with some vacuum generators 5, the adsorbent chamber entrance connection of each vacuum generator 5 is corresponding to inhale
Water knife 4（Vacuum generator 5 is one-to-one setting with water suction knife 4）；Further, it is additionally provided with suction valve, described suction valve
Door is arranged at the compressed air inlet of described vacuum generator 5.Due to the etching required for the printed circuit board of different size time
Number, time are all different, therefore can pass through the opening and closing of control and suck valve, thus controlling the opening and closing of water suction knife 4；Each vacuum is sent out
Raw device 5 individually controls a water suction knife 4, so so that suction is more prone to control, it is to avoid take out when closing is one or more
When inhaling valve, the suction of other water suction knives 4 is substantially improved, the problem leading to printed circuit board 11 to hold.It is further preferred that
Described blower fan 6 is adjustable blower fan, from the size controlling air output, and then controls the suction of water suction knife 4 so that adjusting more smart
Accurate.Preferably, the adsorbent chamber entrance of described vacuum generator 5 is arranged at the top of described water suction knife 4, is arranged such, it is to avoid phase
The pipeline answered affects the operation of circuit board pipeline 1, and aspirates the liquid-vapor mixture returned and can coordinate Action of Gravity Field, more
Spray from the gas outlet of vacuum generator 5 soon.
Preferably, the gas outlet of described vacuum generator 5 is arranged between described circuit board pipeline 1 and liquid medicine container 2,
Or, the gas outlet of described vacuum generator 5 is arranged in liquid medicine container 2, and the liquid medicine 21 that liquid medicine container 2 holds does not soak described
Gas outlet（As shown in Figure 2）.The gas outlet of vacuum generator 5 is arranged at the lower section of circuit board pipeline 1, it is to avoid after suction
Circuit board pipeline 1 fallen into again by liquid medicine 21；The liquid medicine 21 that the gas outlet of vacuum generator 5 is not held with liquid medicine container 2 contacts,
On the one hand avoid liquid medicine 21 that vacuum generator 5 is corroded；And then so that the gas outlet of vacuum generator 5 is more smooth, carry
The operating efficiency of high vacuum generator 5；And, it is to avoid when liquid medicine 21 soaks gas outlet, the height that vacuum generator 5 sprays
The gas-vapor mix of pressure will be squeezed into gas in liquid medicine container 2, produces substantial amounts of bubble, increases the volatilization of liquid medicine 21, thus
Increase the problem of the corrosion to peripheral equipment；Finally, it is to avoid the liquid medicine 21 in liquid medicine container 2 contains substantial amounts of gas, leads to
The liquid medicine 21 of liquid medicine shower nozzle 3 injection is liquid-vapor mixture, the pressure problem very rambunctious of injection.
Preferably, the circuit board production system of the present embodiment, is additionally provided with vapour liquid separator 61, described vapour-liquid filter 61
Gas outlet connect the air inlet of described blower fan 6, the delivery port of described vapour liquid separator 61 is arranged at the upper of described liquid medicine container 2
Side.Because collecting folk songs of blower fan 6 is arranged at liquid medicine container 2 annex, still there are the little water droplet of a certain amount of liquid medicine and liquid medicine steam by wind
Machine 6 aspirates, and the little water droplet of these liquid medicine and liquid medicine steam all can corrode to blower fan 6, thus affecting its life-span, therefore arranges
The little water droplet of 61 liquid medicine of vapour liquid separator and liquid medicine steam are separated, and reduce it and enter blower fan 6.More specifically, described vapour-liquid
Separator 61 is condensing vapour liquid separator, and the inside of vapour liquid separator 61 is filled with macromolecular material（As rubber, silica gel, mould
Material etc.）Condensation ball, it is to avoid liquid medicine 21 corrodes to it.Preferably, the arrival end in vapour liquid separator 61 is provided with vapour-liquid
Filter 63, reduces the entrance of impurity further.
Preferably, the blade of described blower fan 6 and inner chamber etc. are easy to the part that the little water droplet of liquid medicine and liquid medicine steam contact, and adopt
Teflon coating is coated, and because vapour liquid separator 61 is also impossible to completely liquid medicine be separated, still has a little portion
The little water droplet of liquid medicine dividing and liquid medicine steam enter in blower fan 6；Teflon polytetrafluoroethylene (PTFE)
（Polytetrafluoroethene）, english abbreviation is PTFE, and the product of this material is typically referred to as " non-sticking lining "；It is
A kind of artificial synthesized macromolecular material employing all hydrogen atoms in fluorine replacement polyethylene.This material have antiacid alkali resistant,
Resist the feature of various organic solvents.
Preferably, described circuit board pipeline 1 is provided with upper roll wheel 12 and lower roll wheel 13, and described liquid medicine shower nozzle 3 is provided with
Upper nozzle and lower nozzle, described upper nozzle from top to bottom sprays liquid medicine 21, and described lower nozzle from bottom to top sprays liquid medicine 21；Described
Liquid medicine shower nozzle 3 is arranged at and absorbs water between knife 4 two-by-two, and upper roll wheel 12 vacancy of the circuit board pipeline 1 below described upper nozzle sets
Put, the lower roll wheel 13 vacancy setting of the circuit board pipeline 1 above described lower nozzle.It is arranged such, so that the present embodiment
Circuit board production system etching and processing printed circuit board 11 simultaneously positive and negative, when printed circuit board 11 runs to lower roll wheel 13
During vacant locations, the back side that lower nozzle can be ejected into printed circuit board 11 liquid medicine 21 is etched, and printed circuit board 11
When running to upper roll wheel 12 vacant locations, the front that upper nozzle can be ejected into printed circuit board 11 liquid medicine 21 is etched,
Considerably increase the efficiency of processing.
Preferably, it is additionally provided with liquid medicine filter block 31, liquid medicine valve 32, liquid medicine pump 33, go out water filter 34 and water pressure gauge
35, liquid medicine filter block 31 is arranged at liquid medicine container 2, and described liquid medicine pump 33 passes through pipeline communication liquid medicine filter block 31, described water outlet
Filter 34 is arranged at the delivery port of described liquid medicine pump 33, described liquid medicine shower nozzle 3 connect described in go out the delivery port of water filter 34；
Described liquid medicine valve 32 is arranged between liquid medicine filter block 31 and liquid medicine pump 33, goes out between water filter 34 and upper nozzle and water outlet
Between filter 34 and lower nozzle, described go out between water filter 34 and upper nozzle and go out between water filter 34 and lower nozzle
The water side of liquid medicine valve 32 is additionally provided with water pressure gauge 35.It is arranged such, can be controlled by adjusting each liquid medicine valve 32
The opening and closing of liquid medicine shower nozzle 3, and water pressure gauge 35 is set and water filter 34 and liquid medicine can be arranged out with the pressure of monitor in real time liquid medicine 21
Filter block 31, can avoiding the liquid medicine 21 containing impurity to be pumped to liquid medicine pump 33 thus being sprayed by liquid medicine shower nozzle 3, leading to liquid medicine pipe
The problem of the processing effect of the blocking on road and printed circuit board 11.
Preferably, it is additionally provided with air gauge 62, described air gauge 62 is arranged at the air outlet of described blower fan, for monitoring wind
Machine 6 go out wind pressure.
Preferably, described water suction knife 4（As shown in Figure 3,4）Including side wall 41, roof 42, suction through hole 43 and suction nozzle with battery unit
44；Described roof 42, side wall 41 and suction nozzle with battery unit 44 surround into the water suction cavity of described water suction knife 4, and described suction through hole 43 is arranged
Middle part in described roof 42；Described suction nozzle with battery unit 44 is arc-shaped, and described suction nozzle with battery unit 44 is provided with suction hole 441, described water suction
Hole 441 is arranged at the both sides of the center of arc end of suction nozzle with battery unit 44.It is arranged such and be arranged at center of arc end with suction hole 441
Compare although suction hole 441 is somewhat remote with the distance of printed circuit board 11, but because electricity is printed in circuit board pipeline 1 conveying
During the plate 11 of road, printed circuit board 11 more or less also can produce some and beat, and so will avoid and arrive because of suction hole 441 scratching
Printed circuit board 11 and lead to the phenomenon of clamp to occur；When printed circuit board 11 moves and suction nozzle with battery unit 44 as shown in the arrow of Fig. 4
During contact, the center of arc end of suction nozzle with battery unit 44 can contact with printed circuit board 11 so as to rounding off；In addition, it also avoid
The problem getting too close to and leading to printed circuit board 11 to hold with printed circuit board 11 because of suction hole 441（Liquid medicine suction such as Fig. 4
Arrow shown in）.
Preferably, described water suction knife 4 also includes inhaling knife wing 45, and described suction is fixed in described one end inhaling knife wing 45
The side of the suction hole 441 of mouth 44, the middle part of described suction knife wing 45 is to the top bending of described water suction knife 4.Work as printed circuit
Plate 11 transport to water suction knife 4 nearby and produce beat when, knife wing 45 will be inhaled will limit it and beat, thus smooth out entrance inhaling
The lower section of water knife 4 carries out liquid medicine suction operation.
Preferably, described suction nozzle with battery unit 44 is titanium tube, is additionally provided with connection sucker 442, and described connection sucker 442 is arranged at institute
State the center of arc end of the upper end of suction nozzle with battery unit 44.It is arranged such, on the one hand increase the weld strength of suction nozzle with battery unit 44 and side wall 41,
Still further aspect so as to both be more prone to position with welding it is ensured that water suction knife 4 linearity；Connection sucker 442 is arranged at institute
State the center of arc end of the upper end of suction nozzle with battery unit 44, the suction of left and right sides suction hole 441 can be balanced, improve water suction uniformly
Degree.
Preferably, described side wall 41 includes reinforcing portion and extension, and described reinforcing portion is arranged for "L" shaped, described extension
One end of the level of described reinforcing portion is fixed in the one end in portion, and the vertical of described reinforcing portion is fixed at the two ends of described roof 42
One end；Described extension be vertically arranged, described suction nozzle with battery unit 44 be arranged at described extension the other end so that entirely absorb water knife
4 assume down " convex " font.It is arranged such, the reinforcing portion of one side "L" shaped can strengthen the strong of the side wall of knife 4 that entirely absorb water
Degree, it is to avoid it deforms in the course of the work and leads to the phenomenons such as clamp；On the other hand it is ensured that the straight line of the knife 4 that entirely absorbs water
Degree, it is to avoid bend right and left deformation.
Preferably, it is additionally provided with stationary barrier 46 described in water suction knife 4, described top is fixed at the two ends of described stationary barrier 46
The middle part of the inner side of wall 42, the middle part of described stationary barrier 46 is provided with bulkhead through-hole 461.Due to water suction knife 4 be by roof 42,
Side wall 41 and suction nozzle with battery unit 44 around, determining when setting stationary barrier 46 1 aspect can facilitate above-mentioned part to be welded
Position；On the other hand strengthen stability and the intensity of the whole knife 4 that absorbs water, increase its durability.Concrete further, described stationary barrier
The bottom of the reinforcing portion of described roof 42 is fixed at 46 two ends.
Preferably, the suction through hole 43 of described water suction knife 4 is connected with described vacuum generator 5 by telescoping tube.So set
Put, the distance between water suction knife 4 and printed circuit board 11 can be adjusted, to adapt to the printed circuit board 11 of different-thickness, specification；
Preferably, the described suction nozzle with battery unit 44 of water suction knife 4 and the distance of printed circuit board 11 are 2-4mm, if distance is too near, absorb water knife
4 will often scratching to printed circuit board 11 so as to damaging and lead to clamp phenomenon, if the distance is too far, then suction not, no
Method is aspirated liquid medicine 21 totally.It is further preferred that the suction of described water suction knife 4 is 0.2-0.5bar, if suction is excessive,
Easily printed circuit board 11 is held and lead to clamp, if suction is too small, liquid medicine 21 cannot be aspirated totally.
More specifically, the circuit board production system of the present embodiment, for flexible PCB（Flexible Printed
Circuit Board）Production.
Describe know-why of the present utility model above in association with specific embodiment.These descriptions are intended merely to explain this reality
With new principle, and the restriction to the utility model protection domain can not be construed to by any way.Based on explanation herein,
Those skilled in the art does not need to pay performing creative labour and can associate other specific embodiment of the present utility model,
These modes fall within protection domain of the present utility model.
Claims (10)
1. a kind of efficient circuits plate production system, including circuit board pipeline, liquid medicine container, spray system and water suction knife, described
Circuit board pipeline is arranged at the top of described liquid medicine container, and the spray direction of described spray system conveys towards described circuit board
Line, described water suction knife be arranged at described circuit board pipeline top it is characterised in that：
It is additionally provided with vacuum generator and blower fan, the compressed air of the air outlet described vacuum generator of connection of described blower fan enters
Mouthful, the suction through hole of the adsorbent chamber entrance connection described water suction knife of described vacuum generator.
2. efficient circuits plate production system according to claim 1 it is characterised in that：It is provided with some vacuum generators,
The corresponding knife that absorbs water of adsorbent chamber entrance connection of each vacuum generator.
3. efficient circuits plate production system according to claim 1 it is characterised in that：The gas outlet of described vacuum generator
It is arranged between described circuit board pipeline and liquid medicine container, or, the gas outlet of described vacuum generator is arranged at liquid medicine and holds
In device, the liquid medicine that liquid medicine container holds does not soak described gas outlet.
4. efficient circuits plate production system according to claim 1 it is characterised in that：It is additionally provided with vapour liquid separator, institute
The gas outlet stating vapour liquid separator connects the air inlet of described blower fan, and the delivery port of described vapour liquid separator is arranged at described liquid medicine
The top of container.
5. efficient circuits plate production system according to claim 2 it is characterised in that：It is additionally provided with suction valve, described
Suction valve is arranged at the compressed air inlet of described vacuum generator.
6. efficient circuits plate production system according to claim 1 it is characterised in that：Described water suction knife includes side wall, top
Wall, suction through hole and suction nozzle with battery unit；
Described roof, side wall and suction nozzle with battery unit surround into the water suction cavity of described water suction knife, and described suction through hole is arranged at described top
The middle part of wall；Described suction nozzle with battery unit is arc-shaped, and described suction nozzle with battery unit is provided with suction hole, and described suction hole is arranged at the circle of suction nozzle with battery unit
The both sides of arc central end.
7. efficient circuits plate production system according to claim 6 it is characterised in that：Described water suction knife also includes inhaling knife wing
Wing, the side of the suction hole of described suction nozzle with battery unit is fixed in one end of described suction knife wing, and the middle part of described suction knife wing is to described
The top bending of water suction knife.
8. efficient circuits plate production system according to claim 6 it is characterised in that：Described suction nozzle with battery unit is titanium tube, also sets
It is equipped with connection sucker, described connection sucker is arranged at the center of arc end of the upper end of described suction nozzle with battery unit.
9. efficient circuits plate production system according to claim 6 it is characterised in that：It is additionally provided with stationary barrier, described
The middle part of the inner side of described roof is fixed at the two ends of stationary barrier, and the middle part of described stationary barrier is provided with bulkhead through-hole.
10. efficient circuits plate production system according to claim 6 it is characterised in that：The suction through hole of described water suction knife
Connected with described vacuum generator by telescoping tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620740432.0U CN205987557U (en) | 2016-07-14 | 2016-07-14 | High -efficient circuit board production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620740432.0U CN205987557U (en) | 2016-07-14 | 2016-07-14 | High -efficient circuit board production system |
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| Publication Number | Publication Date |
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| CN205987557U true CN205987557U (en) | 2017-02-22 |
Family
ID=58024470
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620740432.0U Active CN205987557U (en) | 2016-07-14 | 2016-07-14 | High -efficient circuit board production system |
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| CN (1) | CN205987557U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012459A (en) * | 2017-05-23 | 2017-08-04 | 深圳市华兴四海机械设备有限公司 | Plate face processes drainage set |
-
2016
- 2016-07-14 CN CN201620740432.0U patent/CN205987557U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012459A (en) * | 2017-05-23 | 2017-08-04 | 深圳市华兴四海机械设备有限公司 | Plate face processes drainage set |
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